Paper-bag machine



J. P. ONDERDONK.

PAPER BAG MACHINE. No. 333,538. PatentedJan. 5, 188 6.

UNITED STATES PATENT OFFICE.

JOHN P. ONDERDONK, OF PHILADELPHIA, PENNSYLVANIA.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent lilo-333,538, dated January 5. 1886.

(No model.)

I 0 all whom it may concern:

Be it'known that I, JOHN P. ONDERDONK, of the city and county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in Paper-Bag Machines, of which the following is a specification.

My invention has reference to paper-bag machines especially adapted for forming square or satchel bottom bags in which one of the free folds or flaps of the bottom is tucked in between the two sides, completely exposing the printing field, (the construction of which bag forms subject-matter of another pending application;) and my invention consists in a peculiar construction of former, by which the above-specified result may be attained, and in many details of construction, all of which are fully set forth in the following specification, and shown in the accompanying drawings, which form part thereof.

In the drawings, Figure 1 is a sectional ele vation of a paper-bag machine embodying my improvements. Fig. 2 is a perspective view of the bottom forming mechanism proper. Fig. 3 is a sectional elevation of the former and forming-knife, and shows the same in the act'of completing the formation of the bottom of the bag. Fig. 4. is a plan view of the forming-knife, indicating the various shapes which the striking-edge may have. Fig. 5 is a side elevation of an end portion of the former. Fig. 6 is a perspective view of a tube as it leaves the former, and shows where the paste is to be applied; and Fig. 7 is a completed bag.

A A are rollers for feeding the tube 0 over the former I), after leaving which it is cut into short lengths by the rotating cutting-blade B, which cuts against a stationary edge, O. This rotating cutting-blade is of the well-known construction, and is secured to a shaft rotated by gearing which connects with the feed-rollers A, so that its action is timed. The tube 0, after leaving the said rollers, is drawn over theformer D by rollers G.

The former D is made with a notch or incision, E, to receive the former knife or blade H. The upper edge, D, of this incision is made, preferably, the full width of the former D, and the bottom face of the incision is extended, as at F, forming a tongue, which may be very narrow; or, if desired, it may be conical or wedge shape by filling in the corners f, preferably forming the rounded shoulders F.

The forming-knife H is preferably of thin sheet metal, and may be reciprocated in separate guides, as indicated in dotted lines in Fig. 3, or pivoted to a rock-shaft, I, as shown in Figs. 1 and 2, in which case it is reciprocated by an arm, J, and rod K, pivoted to a crank-pin, L, on the measuring and cutting cylinder A. The lower edge of the forming-knife is made preferably narrower than the former D, being equal to the distance 0 to 0', so that when the face of the tube is forced down into the former by the said blade the paper is drawn over the edge D and corners F of the former, causing the under face of the tube to be wrapped about the tongue F, forming the oblique folds 0 which pass under the blade H. The notch or incision E may be modified to suit the shape of forming blade, if desired, and the edge D may be made straight, curved, or angulan If the tongue F be provided with a projection, F Fig. 5, the folds (l will pass under the upper surface of the tube and adjacent to the lower surface; hence by slight modifications in the former or the forming-knife. various changes in the shape or degree of fold may be obtained, but in all instances the single reciprocation of the forming-knife H causing the complete folding of the bottom of the bag, putting it in condition to receive the paste. This operation, in forming the tube, is preferably carried on without arresting the travel of the tube; hence the machine is practically continuous in its action. As the forming-knife H rises clear of the tube, the latter passes on between the rollers M, which press it down and feed it forward until the end passes over the rollers O 0, when cutter B severs the tube into the required length, and the pasting-knife N, which receives paste from the paste-feed box P, being thrust down, applies paste, as indicated at c, Fig. 6, and doubles over the end and forces it between the rollers O O, completing the bottom and forming a commercial bag, as indicated in Fig. 7, in which one of the free bottom folds or fiaps is tucked in between the sides of the tube, exposing the entire printing field. This ICO pasting-knife is secured to a bell-crank,which is operated by a cam on the rocking shaft I, which actuates theformer-blade H, though it may be operated in any other suitable manner.

The former D and knife H may be inverted, if desired, and work upwardly instead of downwardly, and the angle at which the blade H enters the former is immaterial to my invention, as it may be anything from a vertical line to ahorizontalline, taking in, say, ninety degrees, the only object being to catch one face of the tube and force it in between the two faces thereof, completely forming the folds of a bottom at one operation.

The particular mechanism shown may be greatly modified, if desired, the essential feature of my invention being in the means for tucking in one of the faces of the tube, as hereinbefore described.

Having now described rny invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a paper-bag machine, a former over or around which the paper tube passes, having a notch or incision, into which one face or side of the tube may be thrust to form an inward fold, in combination with a formingknife adapted to force the paper down into said incision, substantially as and for the purpose specified.

2. In a paper-bag machine, a former over or around which the paper tube passes, having a notch or incision, into which one face or side of the tube may be thrust to form an in- Ward fold,and a rearwardlyextending tongue, over which the bottom folds are made, in combination with a forming-knife adapted to force the paper down into said notch or inclsion, substantially as and for the purpose specified.

3. The former D, having notch or incision E, edge D, and shoulders F, in combination with reciprocating forming-knife H, substantially as and for the purpose specified.

at. The former D, having notch or incision E, edge D, tongue F, and shoulders F, in combination with reciprocating forming-knife H, substantially as and for the purpose specified.

5. The former D, having notch or incison E and tongue F, in combination with the forming-lniit'e, substantially as and for the purpose specified.

6. The former D, having notch or incision E and tongue F, furnished with raised part F in combination with the forming-knife, substantially as and for the purpose specified.

7. The combination of former D, having notch or incision E, knife H, rollers M, .rollers O, paste-knife N, and paste-vat P, substantially as and for the purpose specified.

8. The combination of cut-tingblade B, former D, having notch or incision E, knife H, rollers M, rollers O, paste-knife N, and paste-vat P, substantially as and for the purpose specified.

In testimony of which invention I hereunto set my hand.

JNO. P. ONDERDONK.

Vitnesses:

1?. M. HUNTER, FRANCIS S. BROWN. 

